Adlerkosteletz is a place, that before the Treaty of Saint-Germain belonged to Austro-Hungary and was situated in the administrative region Reichenau a. d. Knieschna.
Adlerkosteletz was formerly part of the German Empire. In the German Empire, the place was called Kostelec nad Orlicí. The place is now called Kostelec nad Orlicí and belongs to Czechoslovakia.